|Rank|Athlete|Qual|Final|Total|Notes|
|---|---|---|---|---|---|
||Silvia Sperber (FRG)|590|95.6|685.6|OR|
||Vesela Letcheva (BUL)|583|100.2|683.2||
||Valentina Cherkasova (URS)|586|95.4|681.4||
|4|Katja Klepp (GDR)|584|96.5|680.5||
|5|Sharon Bowes (CAN)|584|96.5|680.5||
|6|Anna Maloukhina (URS)|585|93.4|678.4||
|7|Launi Meili (USA)|582|94.5|676.5||
|8|Anita Karlsson (SWE)|583|93.4|676.4||

Question: what is the difference in qualifying for sharon bowes and silvia sperber?
Answer: 6